The genesis allocations which we plan to propose sum to a total of 1 billion NAM tokens (this has been discussed previously I believe, albeit not captured in a specific blog post). “Circulating supply” is a bit dependent on exact definitions, which vary - in our proposed mainnet phases, NAM would not be transferable until phase 5. How fast the phases progress is up to community governance. Does that help answer your question here, or are you looking for other information?